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PROCEEDINGS OF THE ELEVENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
Edited by: B.H.V. Topping
Dynamic Response of Structures due to Microtremors
J. Bencat and D. Papán
Department of Structural Mechanics, Faculty of Civil Engineering, University of Zilina, Slovakia
J. Bencat, D. Papán, "Dynamic Response of Structures due to Microtremors", in B.H.V. Topping, (Editor), "Proceedings of the Eleventh International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 142, 2007. doi:10.4203/ccp.86.142
Keywords: microtremor, traffic effects on structures, dynamic response of structures and soils, spectral and correlation analysis, ground vibration spectra.
Ground vibration recorded at a distance from a busy roadway or railway is analyzed assuming it to be a random and statistically a stationary function of time. The soil media are characterized as the viscous - elastic half space [1,5,6]. The analytical method for predicting ground vibration has been described. The spectral density of the ground vibration for a particular case was calculated and the prediction is validated by experimental measurements [1,2,3,4]. The analytical and experimental investigation of unfavourable traffic effects on an industrial building (KINEX) are also described in this paper.
The predicted ground vibration spectrum at the distance is substantially borne out by experiment focused on modelling acutely the transmission of ground borne vibration from busy roads. The sharp spectral peak predicted at 2.1 Hz reflects the assumption that all vehicles have the same "bounce" frequency. Substantial pitching modes in the range 2-5 Hz for typical heavy vehicles with 5 and more axles may also contribute to this effect.
The results of the theoretical and experimental investigation of traffic effects on the industrial buildings structures are analysed mainly from aspects of the safety of the building structure. The KINEX processing buildings are concerned with light engineering products. The processing estimation of the microtremor effect on the tested structureis described in following conclusions:
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